CN104016652A - Autoclaved aerated concrete and preparation method thereof - Google Patents

Autoclaved aerated concrete and preparation method thereof Download PDF

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Publication number
CN104016652A
CN104016652A CN201410236822.XA CN201410236822A CN104016652A CN 104016652 A CN104016652 A CN 104016652A CN 201410236822 A CN201410236822 A CN 201410236822A CN 104016652 A CN104016652 A CN 104016652A
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raw mineral
mineral materials
steam
agent
equivalent
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刘泽
邵宁宁
孔凡龙
王春雪
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China University of Mining and Technology CUMT
China University of Mining and Technology Beijing CUMTB
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China University of Mining and Technology Beijing CUMTB
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Priority to CN201410236822.XA priority Critical patent/CN104016652A/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Abstract

The invention discloses an autoclaved aerated concrete and a preparation method thereof, and the autoclaved aerated concrete comprises mineral raw materials, an alkaline exciting agent, a foaming agent, a foam-stabilizing agent, a slow-release agent and the like. The mineral raw materials comprise 80-100wt.% of fly ash, and other mineral raw materials comprise mineral waste residue, metakaolin, silica fume, steel slag, circulating fluidized bed bottom ash and the like; the alkaline exciting agent mass is 40-55wt.% of the mineral raw material mass, the foaming agent mass is 0.13-5wt.% of the mineral raw material mass, the foam-stabilizing agent mass is 0.03-0.09wt.% the mineral raw material mass, and the slow-release agent mass is 2-3.5wt.% of the mineral raw material mass. The alkaline exciting agent including sodium silicate and NaOH / KOH, the mineral raw materials, the foaming agent and the foam-stabilizing agent are mixed for stirring, then are filled in a mould for prefabrication forming or casting forming, and maintained by autoclaving for 1-24h at 60-160 DEG C under 0.1-1MPa.

Description

A kind of steam-pressing aero-concrete and preparation method thereof
Technical field
The present invention relates to a kind of steam-pressing aero-concrete material and preparation method thereof.
 
Technical background
Along with the continuous consumption of world energy sources, various countries' pay attention to day by day save energy, building energy conservation also becomes one of focus of national governments' concern increasingly.Building trade consumes ample resources, the energy, also can produce solid waste, sewage, noise etc.Building energy conservation is one of important channel alleviating environmental pollution, solution energy dilemma, and building energy consumption accounts for social total energy consumption 30% left and right.The year two thousand twenty whole nation floor area of building will reach 2 times in 2000 according to estimates.The domestic existing area of residence approximately 40,000,000,000 m 2, wherein reach less than 200,000,000 m of design standard for energy efficiency of buildings 2, account for 0.5%, New Dwelling also only has 15% to reach energy conservation standard, cities and towns meet building energy-saving standard the not enough sum of building 3%.To the year two thousand twenty, the building energy conservation of the whole society reaches 65%, and Beijing, megalopolis needs to carry out higher levels of energy conservation standard, reaches 75%, and new building energy-saving horizontal reaches or approaches equal weather condition developed country level.
The raw material types that current China gas concrete is used is various, and performance level is uneven.Starting material are used the amount of flyash to be no more than 70% of solid material, or use in a large number quartz sand to substitute flyash, and the utilization of large solid waste is reduced gradually, are unfavorable for the overall situation of China's solid waste comprehensive utilization.China still has a large amount of flyash to arrange disposal outward every year, and greenbelt environment is caused to huge threat, is also the huge waste of the energy, in the urgent need to the birth of the low-cost gas concrete technology of a kind of high blending flyash.
 
Summary of the invention
In order to improve the volume of flyash in gas concrete is produced, the invention provides a kind of preparation technology simple, stable performance, steam-pressing aero-concrete that low temperature, low pressure are steam-cured and preparation method thereof.
The present invention is achieved by the following technical solutions:
The raw material of steam-pressing aero-concrete of the present invention, comprises raw mineral materials, alkali-activator, whipping agent, suds-stabilizing agent, sustained release dosage.
Described raw mineral materials comprises flyash, and described flyash accounts for 80 ~ 100wt.% of raw mineral materials, and other raw mineral materialss comprise a kind of in slag, metakaolin, silicon ash, slag or circulating fluid-bed bottom ash; Described whipping agent is hydrogen peroxide or aluminium powder; Described alkali-activator comprises water glass and NaOH or KOH, and described suds-stabilizing agent is anion surfactant, cats product or double ion tensio-active agent; Described sustained release dosage is desulfurated plaster.
Steam-pressing aero-concrete of the present invention comprises the raw material of following quality proportioning:
Described alkali-activator: be equivalent to 40 ~ 55 wt.% of raw mineral materials quality, comprise sodium/potash water glass, NaOH/KOH, water; Modulus is 1.0 ~ 2.0, and mass concentration is 15 ~ 40wt.%;
Described hydrogen peroxide: be equivalent to 1 ~ 5 wt.% of raw mineral materials quality, concentration is 30 wt.%;
Described desulfurated plaster: 2 ~ 3.5 wt.% that are equivalent to raw mineral materials quality;
Described suds-stabilizing agent: 0.03 ~ 0.9 wt.% that is equivalent to raw mineral materials quality.
Steam-pressing aero-concrete of the present invention comprises the raw material of following quality proportioning:
Described alkali-activator: be equivalent to 40 ~ 55 wt.% of raw mineral materials quality, comprise sodium/potash water glass, NaOH/KOH, water; Modulus is 1.0 ~ 2.0, and mass concentration is 15 ~ 40wt.%;
Described aluminium powder: 0.13 ~ 0.39 wt.% that is equivalent to raw mineral materials quality;
Described desulfurated plaster: 2 ~ 3.5 wt.% that are equivalent to raw mineral materials quality;
Described suds-stabilizing agent: 0.03 ~ 0.09 wt.% that is equivalent to raw mineral materials quality.
When reaction raw materials mixes, need additional a certain amount of water, make H 2o/Na 2the mol ratio of O is 10 ~ 20;
Described flyash reaches the requirement of GB II level flyash, Al 2o 3mass content>=20 wt.%;
The particle diameter of described other raw mineral materialss is 10 μ m≤D 50≤ 100 μ m, particle fineness 0.080mm tails over≤12 ~ 25%, carbon content≤5%, loss on ignition≤10%;
Described alkali-activator comprises sodium/potash water glass, NaOH/KOH, water, and modulus is 1.0 ~ 2.0, and mass concentration is 15 ~ 40wt.%;
Calcium sulphate content >=85% in described desulfurated plaster, water ratio≤35%;
Active aluminum >=85% in described aluminium powder; Particle fineness 0.075mm tails over≤2%, rate of gas generation 4min 50 ~ 60%, 15min >=90%, 30min >=99%, and water dispersible is good, without agglomerating particles;
Pressurization steam curing temperature is 60-160 oc, pressure is 0.1 ~ 1MPa, and maintain humidity is 70 ~ 99%, and curing time is 1 ~ 24h;
In the steam-pressing aero-concrete making, SiO 2with Al 2o 3mol ratio be: 2.5≤SiO 2/ Al 2o 3≤ 4.5, Na 2o and Al 2o 3mol ratio be: 0.5≤Na 2o/ Al 2o 3≤ 2.
The preparation method of above-mentioned steam-pressing aero-concrete of the present invention, comprises step:
(1) mix and blend
Raw mineral materials, alkali-activator, suds-stabilizing agent are mixed with water, then obtain slip with whipping agent, desulfurated plaster mix and blend, churning time is 1-10 min;
(2) cast
Described slip casting, in mould, is regulated to cast diffusibleness, be 15%;
(3) rest
After casting complete, mould is put into and rested behind chamber, 40 ~ 60 ounder C environment, the slip foaming in described mould, multiviscosisty, sclerosis form the base substrate of intensity>=0.1MPa, and base substrate hardness finishes to rest after reaching 0.1 ~ 0.2MPa, and the time of resting is 30 ~ 90min;
(4) demoulding cutting
By the described base substrate upset demoulding, use cutting machine to cut, remove unnecessary bed material and liftout;
(5) steam press maintenance
The work in-process of well cutting are put into autoclave, at temperature 60-160 oc, pressure is 0.1 ~ 1Mpa, maintenance under the environment that humidity is 70 ~ 99%, curing time is 1 ~ 24h, obtains described steam-pressing aero-concrete finished product after steam pressure finishes.
Preparation technology of the present invention is simple, excellent property, stable, and low temperature, low pressure are steam-cured, and cost is lower.
 
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or scheme of the prior art, to the accompanying drawing of required use in embodiment be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the microscopic appearance figure of the steam-pressing aero-concrete that provides of one embodiment of the invention.
 
Embodiment
One embodiment of the invention has provided a kind of steam-pressing aero-concrete, comprise fly ash base gas concrete, mainly by following raw material, made: flyash is main salic minerals raw material, alkali-activator, whipping agent, suds-stabilizing agent, sustained release dosage etc., wherein raw mineral materials is mainly flyash, and other raw mineral materialss are just like slag, metakaolin, silicon ash, slag, circulating fluid-bed bottom ash etc.Alkali-activator is comprised of sodium (potassium) water glass and NaOH/KOH.Whipping agent can be hydrogen peroxide or aluminium powder.Suds-stabilizing agent can be anion surfactant, cats product or double ion tensio-active agent etc.The proportioning of various raw materials is respectively:
Salic minerals raw material: 80 ~ 100 wt.% flyash, 0 ~ 20% slag, metakaolin, silicon ash, slag, circulating fluid-bed bottom ash etc. are rich in raw material a kind of of sial;
Alkali-activator: 40 ~ 55 wt.% that are equivalent to raw mineral materials quality.Exciting agent comprises sodium (potassium) water glass, NaOH/KOH, water.The modulus of exciting agent is 1.0 ~ 2.0, and mass concentration is at 15 ~ 40wt.%;
Whipping agent:
Select hydrogen peroxide---be equivalent to 1 ~ 5 wt.% of raw mineral materials quality, hydrogen peroxide mass concentration is 30 wt.%;
Or select aluminium powder---be equivalent to 0.13 ~ 0.39 wt.% of raw mineral materials quality;
Desulfurated plaster: 2 ~ 3.5 wt.% that are equivalent to raw mineral materials quality;
Suds-stabilizing agent: 0.03 ~ 0.09 wt.% that is equivalent to raw mineral materials quality.
The content of above-mentioned various raw materials can be also other proportioning as required.
Flyash reaches the requirement of GB II level flyash, Al 2o 3mass content is not less than 20 wt.%;
The particle diameter of other raw mineral materialss is 10 μ m≤D 50≤ 100 μ m, particle fineness 0.080mm tails over≤12 ~ 25%, carbon content≤5%, loss on ignition≤10%;
Alkali-activator comprises sodium (potassium) water glass and NaOH/KOH, and the modulus of water glass is 2.0 ~ 3.5, and the modulus after water glass and NaOH/KOH are compound is 1.0 ~ 2.0, or other moduluses.
As shown in Figure 1, be the microscopic appearance figure of the steam-pressing aero-concrete of the present embodiment.
Another embodiment of the present invention has provided the preparation method of above-mentioned steam-pressing aero-concrete, comprising:
(1) alkali-activator preparation
Selecting sodium (potassium) water glass and NaOH/KOH is raw material, and NaOH/KOH is dissolved in water, controls volumetric molar concentration at 5 ~ 15mol/L; Select sodium (potassium) water glass, controlling modulus is 2 ~ 3.5; The two is mixed, control the overall modulus of mixture 1.0 ~ 2.0; Stir 1 ~ 10min, be placed in plastic containers, standing 12 ~ 48h.
(2) mix and blend
Raw mineral materials, alkali-activator, suds-stabilizing agent are mixed with water, then with whipping agent, desulfurated plaster mix and blend, churning time is 1-10 min, can stir 1,3,5,7,10min etc., until stir;
(3) cast
In mould, regulate cast diffusibleness in 15% left and right slip casting;
(4) rest
Mould is put into and is rested behind chamber, 40 ~ 60 ounder C environment, can be 40,50,60 oc, slip foaming, multiviscosisty, sclerosis form the base substrate of intensity>=0.1MPa, and base substrate hardness finishes to rest after reaching 0.1 ~ 0.2MPa, and the time of resting is at 30 ~ 90min, can be 30,60,90min etc.;
(5) demoulding cutting
The base substrate upset demoulding, is used cutting machine to cut, and removes unnecessary bed material and liftout;
(6) steam press maintenance
The work in-process of well cutting are put into autoclave, at temperature 60-160 oc can be 60,80,100,120,140,160 oc etc.; Pressure is 0.1 ~ 1MPa, can be 0.1,0.3,0.5,0.7,1.0MPa etc.; Maintain humidity is 70 ~ 99%, can be 70,80,90,99% etc.; Curing time is 1 ~ 24h, after steam pressure finishes, obtains finished product.
The performance perameter of the steam-pressing aero-concrete that the present invention obtains is:
embodiment mono-:
Measure sodium silicate 350g, modulus is 3.25, and density is 1.38g/ml; Take 40g NaOH and 40g water mixes, then mix with water glass, 0.27g suds-stabilizing agent, place 24 hours, as liquid basified exciting agent.
Take I level flyash 300g as raw mineral materials, take 15g H 2o 2whipping agent, 6g desulfurated plaster, adds in raw mineral materials, evenly mixes.
Liquid basified exciting agent is mixed with solid material, after stirring, add whipping agent, stir 3min.
Mixed material is poured in steel die or mould of plastics to sealing, 60 o60min rests under C.
The base substrate upset demoulding, is used cutting machine to cut, and removes unnecessary bed material and liftout.
The work in-process of well cutting are put into autoclave, in temperature 90 oc, pressure 0.3MPa, under maintain humidity 90% condition, maintenance 4h, obtains finished product after steam pressure finishes.
The unit weight that gained sample recorded after 7 days is 400kg/m 3, ultimate compression strength is 2.1MPa(7d), thermal conductivity is 0.10W/ (m .k).
 
embodiment bis-:
Measure sodium silicate 240g, modulus is 3.25, and density is 1.38g/ml; Take 37g NaOH and 60g water mixes, then mix with water glass, 0.16g suds-stabilizing agent, place 24 hours, as liquid basified exciting agent.
Take II level flyash 240g, slag 60g, as raw mineral materials, takes 9g H 2o 2whipping agent, 9g desulfurated plaster, adds in raw mineral materials, evenly mixes.
Liquid basified exciting agent is mixed with solid material, after stirring, add whipping agent, stir 1min.
Mixed material is poured in steel die or mould of plastics to sealing, 60 o30min rests under C.
The base substrate upset demoulding, is used cutting machine to cut, and removes unnecessary bed material and liftout.
The work in-process of well cutting are put into autoclave, in temperature 100 oc, pressure 0.5MPa, under maintain humidity 70% condition, maintenance 2h, obtains finished product after steam pressure finishes.
The unit weight that gained sample recorded after 7 days is 600kg/m 3, ultimate compression strength is 4.2MPa(7d), thermal conductivity is 0.155W/ (m .k).
 
embodiment tri-:
Measure potash water glass 240g, modulus is 3.25, and density is 1.65g/ml; Take 45g KOH and 50g water mixes, then mix with water glass, 0.2g suds-stabilizing agent, place 12 hours, as liquid basified exciting agent.
Take II level flyash 240g, metakaolin 60g, as raw mineral materials, takes 0.87g aluminium powder, and 6g desulfurated plaster adds in raw mineral materials, evenly mixes.
Liquid basified exciting agent is mixed with solid material, after stirring, add whipping agent, stir 3min.
Mixed material is poured in steel die or mould of plastics to sealing, 40 o90min rests under C.
The base substrate upset demoulding, is used cutting machine to cut, and removes unnecessary bed material and liftout.
The work in-process of well cutting are put into autoclave, in temperature 60 oc, pressure 0.1MPa, under maintain humidity 99% condition, maintenance 2h, obtains finished product after steam pressure finishes.
The unit weight that gained sample recorded after 7 days is 500kg/m 3, ultimate compression strength is 3.7MPa(7d), thermal conductivity is 0.136W/ (m .k).
 
embodiment tetra-:
Measure sodium silicate 220g, modulus is 3.25, and density is 1.38g/ml; Take 50g NaOH and 80g water mixes, then mix with water glass, 0.13g suds-stabilizing agent, place 36 hours, as liquid basified exciting agent.
Take II level flyash 270g, silicon ash 30g, as raw mineral materials, takes 0.56g aluminium powder, and 9g desulfurated plaster, adds in raw mineral materials, evenly mixes.
Liquid basified exciting agent is mixed with solid material, after stirring, add whipping agent, stir 3min.
Mixed material is poured in steel die or mould of plastics to sealing, 50 o30min rests under C.
The base substrate upset demoulding, is used cutting machine to cut, and removes unnecessary bed material and liftout.
The work in-process of well cutting are put into autoclave, in temperature 80 oc, pressure 0.5MPa, under maintain humidity 99% condition, maintenance 8h, obtains finished product after steam pressure finishes.
The unit weight that gained sample recorded after 7 days is 700kg/m 3, ultimate compression strength is 7.8MPa(7d), thermal conductivity is 0.168W/ (m.K).
 
embodiment five:
Measure sodium silicate 300g, modulus is 3.25, and density is 1.38g/ml; Take 40g NaOH and 80g water mixes, then mix with water glass, 0.2g suds-stabilizing agent, place 36 hours, as liquid basified exciting agent.
Take II level flyash 270g, slag 30g, as raw mineral materials, takes 11g H 2o 2whipping agent, 6g desulfurated plaster, adds in raw mineral materials, evenly mixes.
Liquid basified exciting agent is mixed with solid material, after stirring, add whipping agent, stir 5min.
Mixed material is poured in steel die or mould of plastics to sealing, 60 o60min rests under C.
The base substrate upset demoulding, is used cutting machine to cut, and removes unnecessary bed material and liftout.
The work in-process of well cutting are put into autoclave, in temperature 120 oc, pressure 0.7MPa, under maintain humidity 99% condition, maintenance 12h, obtains finished product after steam pressure finishes.
The unit weight that gained sample recorded after 7 days is 500kg/m 3, ultimate compression strength is 3.5MPa(7d), thermal conductivity is 0.138W/ (m.K).
 
embodiment six:
Measure sodium silicate 210g, modulus is 3.25, and density is 1.38g/ml; Take 45g NaOH and 40g water mixes, then mix with water glass, 0.09g suds-stabilizing agent, place 12 hours, as liquid basified exciting agent.
Take II level flyash 265g, silicon ash 45g, as raw mineral materials, takes 0.4g aluminium powder, and 9g desulfurated plaster, adds in raw mineral materials, evenly mixes.
Liquid basified exciting agent is mixed with solid material, after stirring, add whipping agent, stir 3min.
Mixed material is poured in steel die or mould of plastics to sealing, 60 o60min rests under C.
The base substrate upset demoulding, is used cutting machine to cut, and removes unnecessary bed material and liftout.
The work in-process of well cutting are put into autoclave, in temperature 110 oc, pressure 0.9MPa, under maintain humidity 90% condition, maintenance 12h, obtains finished product after steam pressure finishes.
The unit weight that gained sample recorded after 7 days is 800kg/m 3, ultimate compression strength is 11.5MPa(7d), thermal conductivity is 0.19W/ (m.K).
Steam-pressing aero-concrete of the present invention be take flyash as main raw material, and in conjunction with other raw mineral materialss, the chemical foaming technology of application of advanced is prepared from, and manufacture craft is simple, dependable performance, good stability.Product can be used as fire-retardant material, lagging material, sound-proof material, thermal insulation material etc.
The above; the embodiment of only optimizing for the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.

Claims (6)

1. a steam-pressing aero-concrete, is characterized in that, described concrete comprises raw mineral materials, alkali-activator, whipping agent, suds-stabilizing agent, sustained release dosage.
2. steam-pressing aero-concrete according to claim 1, it is characterized in that, described raw mineral materials comprises flyash, and described flyash accounts for 80 ~ 100wt.% of raw mineral materials, and other raw mineral materialss comprise a kind of in slag, metakaolin, silicon ash, slag or circulating fluid-bed bottom ash; Described whipping agent is hydrogen peroxide or aluminium powder; Described alkali-activator comprises water glass and NaOH or KOH, and described suds-stabilizing agent is anion surfactant, cats product or double ion tensio-active agent; Described sustained release dosage is desulfurated plaster.
3. steam-pressing aero-concrete according to claim 2, is characterized in that, comprises the raw material of following quality proportioning:
Described alkali-activator: be equivalent to 40 ~ 55 wt.% of raw mineral materials quality, comprise sodium/potash water glass, NaOH/KOH, water; Modulus is 1.0 ~ 2.0, and mass concentration is 15 ~ 40wt.%;
Described hydrogen peroxide: be equivalent to 1 ~ 5 wt.% of raw mineral materials quality, concentration is 30 wt.%;
Described desulfurated plaster: 2 ~ 3.5 wt.% that are equivalent to raw mineral materials quality;
Described suds-stabilizing agent: 0.03 ~ 0.9 wt.% that is equivalent to raw mineral materials quality.
4. steam-pressing aero-concrete according to claim 2, is characterized in that, comprises the raw material of following quality proportioning:
Described alkali-activator: be equivalent to 40 ~ 55 wt.% of raw mineral materials quality, comprise sodium/potash water glass, NaOH/KOH, water; Modulus is 1.0 ~ 2.0, and mass concentration is 15 ~ 40wt.%;
Described aluminium powder: 0.13 ~ 0.39 wt.% that is equivalent to raw mineral materials quality;
Described desulfurated plaster: 2 ~ 3.5 wt.% that are equivalent to raw mineral materials quality;
Described suds-stabilizing agent: 0.03 ~ 0.09 wt.% that is equivalent to raw mineral materials quality.
5. steam-pressing aero-concrete according to claim 2, is characterized in that, when reaction raw materials mixes, needs additional a certain amount of water, makes H 2o/Na 2the mol ratio of O is 10 ~ 20;
Described flyash reaches the requirement of GB II level flyash, Al 2o 3mass content>=20 wt.%;
The particle diameter of described other raw mineral materialss is 10 μ m≤D 50≤ 100 μ m, particle fineness 0.080mm tails over≤12 ~ 25%, carbon content≤5%, loss on ignition≤10%;
Described alkali-activator comprises sodium/potash water glass, NaOH/KOH, water, and modulus is 1.0 ~ 2.0, and mass concentration is 15 ~ 40wt.%;
Calcium sulphate content >=85% in described desulfurated plaster, water ratio≤35%;
Active aluminum >=85% in described aluminium powder; Particle fineness 0.075mm tails over≤2%, rate of gas generation 4min 50 ~ 60%, 15min >=90%, 30min >=99%, and water dispersible is good, without agglomerating particles;
Pressurization steam curing temperature is 60-160 oc, pressure is 0.1 ~ 1MPa, and maintain humidity is 70 ~ 99%, and curing time is 1 ~ 24h;
In the steam-pressing aero-concrete making, SiO 2with Al 2o 3mol ratio be: 2.5≤SiO 2/ Al 2o 3≤ 4.5, Na 2o and Al 2o 3mol ratio be: 0.5≤Na 2o/ Al 2o 3≤ 2.
6. a preparation method for steam-pressing aero-concrete, is characterized in that, comprises following preparation process:
Raw mineral materials, alkali-activator, suds-stabilizing agent are mixed with water, then obtain slip with whipping agent, desulfurated plaster mix and blend, churning time is 1-10 min;
Described slip casting, in mould, is regulated to cast diffusibleness, be 15%;
After casting complete, mould is put into and rested behind chamber, 40 ~ 60 oCunder environment, the slip foaming in described mould, multiviscosisty, sclerosis form the base substrate of intensity>=0.1MPa, and base substrate hardness finishes to rest after reaching 0.1 ~ 0.2MPa, and the time of resting is 30 ~ 90min;
By the described base substrate upset demoulding, use cutting machine to cut, remove unnecessary bed material and liftout;
The work in-process of well cutting are put into autoclave, at temperature 60-160 oc, pressure is 0.1 ~ 1MPa, maintenance under the environment that humidity is 70 ~ 99%, curing time is 1 ~ 24h, obtains described steam-pressing aero-concrete finished product after steam pressure finishes.
CN201410236822.XA 2014-05-30 2014-05-30 Autoclaved aerated concrete and preparation method thereof Pending CN104016652A (en)

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CN108863122A (en) * 2018-07-27 2018-11-23 中国矿业大学(北京) A kind of natural hydraulic lime and preparation method thereof
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CN116239394B (en) * 2023-03-06 2024-01-23 燕山大学 Method for regulating chemical foaming reaction rate in preparation of inorganic foaming heat-insulating material

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Application publication date: 20140903